/* ============ Design Tokens ============ */
:root {
  --green-950: #03331c;
  --green-900: #064e2c;
  --green-800: #0a6b3c;
  --green-700: #0d7a44;
  --green-600: #119a56;
  --green-500: #1bb56e;
  --green-400: #4dd199;
  --green-300: #8be7bd;
  --green-200: #c8f2dd;
  --green-100: #dff7ea;
  --green-50:  #edfbf3;

  --cream: #fbf8f1;
  --ink-900: #0b1f14;
  --ink-700: #2a3b31;
  --ink-600: #3d4f45;
  --ink-500: #55675c;
  --ink-400: #7c8b82;
  --line: rgba(11, 31, 20, 0.08);
  --line-2: rgba(11, 31, 20, 0.14);

  --danger: #c53b3b;
  --amber: #d98a1a;

  --shadow-1: 0 1px 2px rgba(6, 78, 44, .05), 0 6px 24px rgba(6, 78, 44, .06);
  --shadow-2: 0 10px 40px rgba(6, 78, 44, .12);
  --shadow-3: 0 24px 80px rgba(6, 78, 44, .22);

  --radius: 20px;
  --radius-sm: 12px;

  --font-body: "Inter", "Segoe UI", -apple-system, system-ui, sans-serif;
  --font-display: "Fraunces", "Georgia", serif;

  --ease-out: cubic-bezier(.22, 1, .36, 1);
  --ease-io:  cubic-bezier(.76, 0, .24, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; background: var(--cream); color: var(--ink-900); }
body {
  font-family: var(--font-body);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
  line-height: 1.55;
}

/* ====== Living background ====== */
.bg-canvas {
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
}
.bg-canvas::before,
.bg-canvas::after {
  content: ""; position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: .5;
  transition: transform 1.2s var(--ease-out);
}
.bg-canvas::before {
  width: 55vw; height: 55vw;
  background: radial-gradient(circle, rgba(27, 181, 110, 0.30), transparent 60%);
  top: -20vw; right: -15vw;
}
.bg-canvas::after {
  width: 50vw; height: 50vw;
  background: radial-gradient(circle, rgba(13, 122, 68, 0.28), transparent 60%);
  bottom: -20vw; left: -15vw;
}
.grain {
  position: fixed; inset: 0; z-index: 1; pointer-events: none;
  opacity: .35; mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.04 0 0 0 0 0.27 0 0 0 0 0.17 0 0 0 0.06 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* ====== Top Bar ====== */
.topbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px;
  backdrop-filter: blur(14px) saturate(140%);
  background: rgba(251, 248, 241, 0.72);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 600; color: var(--green-800); }
.brand .logo { height: 34px; width: auto; max-width: 240px; object-fit: contain; flex-shrink: 0; }
.brand .brand-title { font-size: 14px; letter-spacing: .02em; }
.brand .brand-sub { color: var(--ink-500); font-size: 12px; margin-left: 2px; font-weight: 500; }

.controls { display: flex; align-items: center; gap: 8px; }
.ctrl {
  appearance: none; background: transparent; border: 1px solid var(--line);
  width: 40px; height: 40px; border-radius: 12px; cursor: pointer;
  display: grid; place-items: center; color: var(--ink-700);
  transition: all .25s var(--ease-out);
}
.ctrl:hover { background: var(--green-50); color: var(--green-800); border-color: var(--green-200); transform: translateY(-1px); }
.ctrl:active { transform: translateY(0); }
.ctrl svg { width: 16px; height: 16px; }
.counter {
  font-variant-numeric: tabular-nums; font-size: 13px; color: var(--ink-500); padding: 0 10px;
}

.progress {
  position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 60;
  background: transparent;
}
.progress-bar {
  height: 100%; background: linear-gradient(90deg, var(--green-700), var(--green-400), var(--green-500));
  background-size: 200% 100%;
  width: 0%; transition: width .6s var(--ease-out);
  animation: shimmer 3s linear infinite;
}
@keyframes shimmer { 0% { background-position: 0% 0; } 100% { background-position: 200% 0; } }

/* ====== Chapter markers ====== */
.chapters {
  position: fixed; left: 20px; top: 50%; transform: translateY(-50%);
  z-index: 45; display: flex; flex-direction: column; gap: 6px;
}
.chapter-dot {
  width: 8px; height: 8px; border-radius: 999px;
  background: var(--line-2); cursor: pointer; position: relative;
  transition: all .3s var(--ease-out);
}
.chapter-dot.active { background: var(--green-700); transform: scale(1.4); }
.chapter-dot:hover { background: var(--green-500); }
.chapter-dot .tip {
  position: absolute; left: 18px; top: 50%; transform: translateY(-50%);
  background: var(--ink-900); color: white; font-size: 11px;
  padding: 4px 10px; border-radius: 6px; white-space: nowrap;
  opacity: 0; pointer-events: none; transition: opacity .25s var(--ease-out);
}
.chapter-dot:hover .tip { opacity: 1; }

/* ====== Stage ====== */
.stage {
  position: relative; width: 100vw; height: 100vh;
  overflow: hidden; z-index: 2;
}

.slide {
  position: absolute; inset: 0;
  opacity: 0;
  pointer-events: none;
  will-change: transform, opacity;
  overflow: hidden;
}
.slide-inner {
  width: 100%; min-height: 100%;
  padding: 96px 8vw 120px;
  display: flex; flex-direction: column;
  justify-content: flex-start;
  box-sizing: border-box;
}
.slide-content-wrap {
  margin: auto 0;
  width: 100%;
}
.slide.active { opacity: 1; pointer-events: auto; }

/* Slide transition variants — JS uses data-transition on stage */
.stage[data-transition="fade"] .slide.entering { animation: fadeIn .7s var(--ease-out) forwards; }
.stage[data-transition="fade"] .slide.exiting  { animation: fadeOut .5s var(--ease-out) forwards; }
.stage[data-transition="slide-l"] .slide.entering { animation: slideInL .8s var(--ease-out) forwards; }
.stage[data-transition="slide-l"] .slide.exiting  { animation: slideOutL .6s var(--ease-out) forwards; }
.stage[data-transition="slide-r"] .slide.entering { animation: slideInR .8s var(--ease-out) forwards; }
.stage[data-transition="slide-r"] .slide.exiting  { animation: slideOutR .6s var(--ease-out) forwards; }
.stage[data-transition="zoom"] .slide.entering { animation: zoomIn .7s var(--ease-spring) forwards; }
.stage[data-transition="zoom"] .slide.exiting  { animation: zoomOut .5s var(--ease-out) forwards; }

@keyframes fadeIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
@keyframes fadeOut { from { opacity: 1; } to { opacity: 0; transform: translateY(-16px); } }
@keyframes slideInL { from { opacity: 0; transform: translateX(6vw); } to { opacity: 1; transform: none; } }
@keyframes slideOutL { from { opacity: 1; } to { opacity: 0; transform: translateX(-6vw); } }
@keyframes slideInR { from { opacity: 0; transform: translateX(-6vw); } to { opacity: 1; transform: none; } }
@keyframes slideOutR { from { opacity: 1; } to { opacity: 0; transform: translateX(6vw); } }
@keyframes zoomIn { from { opacity: 0; transform: scale(.94); } to { opacity: 1; transform: none; } }
@keyframes zoomOut { from { opacity: 1; } to { opacity: 0; transform: scale(1.04); } }

/* parallax */
.parallax { transition: transform .6s var(--ease-out); will-change: transform; }

/* ====== Typography ====== */
.kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 11.5px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--green-800); font-weight: 600;
  padding: 8px 16px; border-radius: 999px;
  background: var(--green-50); border: 1px solid var(--green-200);
  width: fit-content;
  backdrop-filter: blur(6px);
}
.kicker::before {
  content: ""; width: 7px; height: 7px; border-radius: 999px; background: var(--green-600);
  box-shadow: 0 0 0 4px rgba(27, 181, 110, .18);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(27, 181, 110, .18); }
  50% { box-shadow: 0 0 0 10px rgba(27, 181, 110, 0); }
}
.slide-num {
  position: absolute; top: 96px; right: 8vw;
  font-family: var(--font-display);
  font-size: 13px; color: var(--ink-400);
  letter-spacing: .14em;
  display: flex; align-items: center; gap: 8px;
}
.slide-num::before {
  content: ""; width: 20px; height: 1px; background: var(--ink-400);
}

h1.title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(34px, 4.6vw, 68px);
  line-height: 1.05;
  letter-spacing: -0.022em;
  margin: 20px 0 14px;
  color: var(--ink-900);
  max-width: 22ch;
}
h1.title em {
  font-style: italic;
  color: var(--green-700);
}
.subtitle {
  font-size: clamp(16px, 1.6vw, 22px);
  color: var(--ink-500); margin: 0 0 22px; max-width: 60ch;
}

/* ====== Content Patterns ====== */
.body-list { list-style: none; padding: 0; margin: 24px 0 0; max-width: 68ch; }
.body-list li {
  padding: 14px 0;
  font-size: clamp(16px, 1.35vw, 20px);
  color: var(--ink-700);
  border-bottom: 1px dashed var(--line-2);
  position: relative; padding-left: 30px;
}
.body-list li::before {
  content: ""; position: absolute; left: 0; top: 22px;
  width: 12px; height: 12px; border-radius: 4px;
  background: linear-gradient(135deg, var(--green-500), var(--green-700));
  transform: rotate(45deg);
}
.body-list li:last-child { border-bottom: 0; }

.bullets { list-style: none; padding: 0; margin: 28px 0 0; display: grid; gap: 14px; max-width: 76ch; }
.bullets li {
  display: flex; gap: 18px; align-items: flex-start;
  padding: 18px 22px; background: rgba(255,255,255,.8);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-1);
  backdrop-filter: blur(6px);
  transition: all .3s var(--ease-out);
  cursor: default;
}
.bullets li:hover {
  transform: translateX(6px);
  border-color: var(--green-200);
  box-shadow: var(--shadow-2);
}
.bullets li .ico {
  flex: 0 0 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, var(--green-100), var(--green-50));
  color: var(--green-700);
  display: grid; place-items: center;
  transition: transform .4s var(--ease-spring);
}
.bullets li:hover .ico { transform: rotate(-8deg) scale(1.1); }
.bullets li .ico svg { width: 22px; height: 22px; }
.bullets li p { margin: 8px 0 0; color: var(--ink-700); font-size: clamp(15px, 1.25vw, 18px); }

.cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; margin-top: 30px; max-width: 1120px; }
.card {
  background: rgba(255,255,255,.82);
  border: 1px solid var(--line);
  border-radius: var(--radius); padding: 30px;
  box-shadow: var(--shadow-1);
  position: relative; overflow: hidden;
  backdrop-filter: blur(8px);
  transition: transform .4s var(--ease-out), box-shadow .4s var(--ease-out), border-color .4s var(--ease-out);
  cursor: pointer;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-2); border-color: var(--green-200); }
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--green-700), var(--green-400));
  transform: scaleX(0); transform-origin: left; transition: transform .7s var(--ease-out) .15s;
}
.card.in::before { transform: scaleX(1); }
.card::after {
  content: ""; position: absolute; inset: auto -40% -60% auto;
  width: 180px; height: 180px; border-radius: 50%;
  background: radial-gradient(circle, rgba(27, 181, 110, .14), transparent 70%);
  opacity: 0; transition: opacity .4s var(--ease-out);
}
.card:hover::after { opacity: 1; }
.card .ico {
  width: 48px; height: 48px; border-radius: 14px;
  background: linear-gradient(135deg, var(--green-100), var(--green-50));
  color: var(--green-700);
  display: grid; place-items: center; margin-bottom: 18px;
  position: relative; z-index: 1;
  transition: transform .4s var(--ease-spring);
}
.card:hover .ico { transform: rotate(-6deg) scale(1.08); }
.card h3 { margin: 0 0 10px; font-size: 22px; font-weight: 600; color: var(--ink-900); position: relative; z-index: 1; }
.card p { margin: 0; color: var(--ink-700); font-size: 16px; position: relative; z-index: 1; }

/* Quote */
.quote {
  font-family: var(--font-display);
  font-size: clamp(24px, 3vw, 40px);
  line-height: 1.25;
  color: var(--ink-900);
  max-width: 26ch;
  margin: 28px 0 0;
  padding-left: 30px;
  border-left: 3px solid var(--green-600);
  font-weight: 400;
  letter-spacing: -0.01em;
  position: relative;
}
.quote::before {
  content: "\201C"; position: absolute; left: -10px; top: -30px;
  font-size: 140px; color: var(--green-200); font-family: var(--font-display);
  line-height: 1;
}
.quote-full {
  font-family: var(--font-display);
  font-size: clamp(30px, 4.2vw, 60px);
  line-height: 1.18;
  color: var(--ink-900);
  max-width: 22ch;
  letter-spacing: -0.02em;
  font-weight: 400;
  position: relative;
}
.quote-full .hl {
  background: linear-gradient(120deg, transparent 0%, transparent 25%, rgba(77, 209, 153, .4) 25%, rgba(77, 209, 153, .4) 75%, transparent 75%);
  padding: 0 6px;
}
.attribution {
  margin-top: 22px; color: var(--ink-500);
  font-size: 14px; letter-spacing: .14em; text-transform: uppercase;
}

/* Compare row */
.compare { display: grid; grid-template-columns: 1fr auto 1fr; gap: 24px; align-items: center; margin-top: 30px; max-width: 1100px; }
.compare .cmp {
  background: rgba(255,255,255,.85); border-radius: var(--radius);
  border: 1px solid var(--line); padding: 26px;
  position: relative; overflow: hidden;
  transition: transform .4s var(--ease-out);
}
.compare .cmp:hover { transform: translateY(-4px); }
.compare .cmp.bad { border-color: rgba(197, 59, 59, .25); background: linear-gradient(135deg, #fff6f4, rgba(255, 246, 244, .6)); }
.compare .cmp.good { border-color: var(--green-200); background: linear-gradient(135deg, var(--green-50), rgba(237, 251, 243, .6)); }
.compare .cmp h4 { margin: 0 0 8px; font-size: 12px; letter-spacing: .2em; text-transform: uppercase; font-weight: 700; }
.compare .cmp.bad h4 { color: var(--danger); }
.compare .cmp.good h4 { color: var(--green-700); }
.compare .cmp p { margin: 0; font-size: 17px; color: var(--ink-700); }
.compare .arrow {
  width: 60px; height: 60px; border-radius: 999px;
  background: linear-gradient(135deg, var(--green-700), var(--green-500));
  color: white;
  display: grid; place-items: center;
  box-shadow: 0 8px 24px rgba(13, 122, 68, .35);
  animation: nudge 1.6s var(--ease-io) infinite;
}
.compare .arrow svg { width: 26px; height: 26px; }
@keyframes nudge {
  0%, 100% { transform: translateX(0); }
  50% { transform: translateX(8px); }
}

/* Swap formulas — interactive */
.swap-row {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 28px; align-items: center;
  margin-top: 48px; max-width: 1100px;
  perspective: 1200px;
}
.swap-tile {
  padding: 48px 36px; border-radius: var(--radius);
  font-family: var(--font-display); font-size: clamp(26px, 2.8vw, 40px);
  line-height: 1.08; letter-spacing: -0.015em;
  text-align: center; min-height: 200px;
  display: grid; place-items: center;
  box-shadow: var(--shadow-2);
  position: relative; overflow: hidden;
  transition: transform .5s var(--ease-spring);
  cursor: pointer;
}
.swap-tile:hover { transform: translateY(-6px) rotateX(4deg); }
.swap-tile .glow {
  position: absolute; inset: -50%; opacity: 0;
  background: radial-gradient(circle at center, rgba(255,255,255,.5), transparent 60%);
  transition: opacity .6s var(--ease-out);
}
.swap-tile:hover .glow { opacity: 1; animation: swirl 6s linear infinite; }
@keyframes swirl { from { transform: rotate(0); } to { transform: rotate(360deg); } }

.swap-tile.from {
  background: linear-gradient(135deg, #ffe8e3, #fff6f4); color: var(--danger);
  border: 1px solid rgba(197, 59, 59, .2);
  text-decoration: line-through; text-decoration-thickness: 3px;
  text-decoration-color: rgba(197, 59, 59, .45);
}
.swap-tile.to {
  background: linear-gradient(135deg, var(--green-800), var(--green-500));
  color: white; border: 0;
}
.swap-tile.to .shine {
  position: absolute; top: 0; bottom: 0; left: -100%; width: 40%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.35), transparent);
  transform: skewX(-20deg);
  animation: shine 3.5s var(--ease-out) infinite;
}
@keyframes shine {
  0% { left: -100%; } 60% { left: 200%; } 100% { left: 200%; }
}
.swap-arrow {
  width: 72px; height: 72px; border-radius: 999px;
  background: white; color: var(--green-700);
  display: grid; place-items: center;
  box-shadow: var(--shadow-2);
  cursor: pointer;
  transition: transform .5s var(--ease-spring);
}
.swap-arrow:hover { transform: rotate(180deg) scale(1.1); }
.swap-arrow.active svg { animation: spinOnce .7s var(--ease-spring); }
@keyframes spinOnce {
  0% { transform: rotate(0); } 100% { transform: rotate(180deg); }
}
.slide.active .swap-arrow { animation: spin-in .8s var(--ease-spring) .4s both; }
.swap-arrow svg { width: 30px; height: 30px; }
@keyframes spin-in {
  from { transform: rotate(-180deg) scale(.5); opacity: 0; }
  to { transform: rotate(0) scale(1); opacity: 1; }
}

/* Stages — interactive timeline */
.stages {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 36px; max-width: 1200px;
  position: relative;
}
.stages::before {
  content: ""; position: absolute; top: 40px; left: 14%; right: 14%; height: 2px;
  background: linear-gradient(90deg, var(--green-300), var(--green-500), var(--green-300));
  z-index: 0;
}
.stage-card {
  background: rgba(255,255,255,.88); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 28px; position: relative; box-shadow: var(--shadow-1);
  cursor: pointer;
  transition: all .4s var(--ease-out);
  z-index: 1;
}
.stage-card:hover, .stage-card.focused {
  transform: translateY(-6px);
  box-shadow: var(--shadow-2);
  border-color: var(--green-300);
}
.stage-card.focused { background: white; }
.stage-card .dot {
  position: absolute; top: -9px; left: 50%; transform: translateX(-50%);
  width: 20px; height: 20px; border-radius: 999px;
  background: var(--green-700); border: 3px solid var(--cream);
  box-shadow: 0 0 0 0 rgba(13, 122, 68, .4);
  transition: box-shadow .3s var(--ease-out);
}
.stage-card:hover .dot, .stage-card.focused .dot {
  box-shadow: 0 0 0 8px rgba(13, 122, 68, .2);
}
.stage-card .tag {
  display: inline-block; font-size: 11px; letter-spacing: .2em;
  background: var(--green-700); color: white; padding: 5px 12px; border-radius: 6px;
  margin: 14px 0 14px; font-weight: 600;
}
.stage-card h3 { margin: 0 0 10px; font-size: 22px; color: var(--ink-900); font-weight: 600; }
.stage-card p { margin: 0; color: var(--ink-700); font-size: 15px; }
.stage-card .step-num {
  position: absolute; top: 14px; right: 22px;
  font-family: var(--font-display); font-size: 42px; color: var(--green-200);
  font-weight: 500; line-height: 1;
}

/* Speech */
.speech-list { display: grid; gap: 20px; margin-top: 30px; max-width: 920px; }
.speech {
  background: rgba(255,255,255,.9); border-radius: var(--radius); border: 1px solid var(--line);
  padding: 26px 30px; box-shadow: var(--shadow-1);
  position: relative; overflow: hidden;
  transition: all .4s var(--ease-out);
}
.speech::before {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
  background: linear-gradient(180deg, var(--green-600), var(--green-400));
}
.speech:hover { transform: translateX(6px); border-color: var(--green-200); box-shadow: var(--shadow-2); }
.speech .tag {
  display: inline-block; font-size: 11px; letter-spacing: .18em;
  color: var(--green-700); background: var(--green-50);
  padding: 5px 12px; border-radius: 6px; text-transform: uppercase; font-weight: 700;
  margin-bottom: 12px;
}
.speech blockquote {
  margin: 0; font-family: var(--font-display); font-size: 23px;
  color: var(--ink-900); line-height: 1.35;
}
.speech .effect { margin-top: 12px; font-size: 13px; color: var(--ink-500); }
.speech .effect b { color: var(--green-700); font-weight: 700; margin-right: 6px; }

/* Weeks — interactive */
.weeks {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 48px;
  position: relative; max-width: 1200px;
}
.weeks::before {
  content: ""; position: absolute; top: -2px; left: 12%; right: 12%; height: 2px;
  background: repeating-linear-gradient(90deg, var(--green-300) 0 10px, transparent 10px 20px);
  z-index: 0;
}
.week {
  position: relative; z-index: 1;
  background: rgba(255,255,255,.9); border-radius: var(--radius); padding: 26px 22px 22px;
  border: 1px solid var(--line); box-shadow: var(--shadow-1);
  text-align: left; cursor: pointer;
  transition: all .4s var(--ease-spring);
}
.week:hover, .week.focused {
  transform: translateY(-8px);
  border-color: var(--green-300);
  box-shadow: var(--shadow-3);
}
.week .circle {
  width: 52px; height: 52px; border-radius: 999px;
  background: linear-gradient(135deg, var(--green-800), var(--green-500));
  color: white;
  font-family: var(--font-display); font-size: 22px; font-weight: 500;
  display: grid; place-items: center;
  margin: -50px 0 16px;
  box-shadow: 0 10px 20px rgba(13, 122, 68, .3);
  transition: transform .4s var(--ease-spring);
}
.week:hover .circle, .week.focused .circle { transform: scale(1.15) rotate(-8deg); }
.week h4 { margin: 0 0 6px; font-size: 18px; font-weight: 600; }
.week p { margin: 0; color: var(--ink-700); font-size: 14px; }

/* ====== Cover slide ====== */
.cover-wrap { text-align: left; max-width: 1000px; position: relative; z-index: 2; }
.cover-wrap .logo-row { display: flex; align-items: center; gap: 14px; margin-bottom: 32px; }
.cover-wrap .logo-row .dot {
  width: 10px; height: 10px; border-radius: 999px; background: var(--green-600);
  box-shadow: 0 0 0 5px rgba(27, 181, 110, .18);
  animation: pulse 2.4s ease-in-out infinite;
}
.cover-wrap .logo-row span { color: var(--ink-500); font-size: 13px; letter-spacing: .14em; text-transform: uppercase; }
.cover-wrap h1 {
  font-family: var(--font-display);
  font-size: clamp(48px, 6.8vw, 112px);
  line-height: 0.98; letter-spacing: -0.035em; margin: 0 0 20px;
  font-weight: 400;
}
.cover-wrap h1 .word { display: inline-block; overflow: hidden; }
.cover-wrap h1 .grad {
  background: linear-gradient(120deg, var(--green-800), var(--green-500) 50%, var(--green-600));
  background-size: 200% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-style: italic;
  animation: grad 6s ease-in-out infinite;
}
@keyframes grad { 0%, 100% { background-position: 0% 0; } 50% { background-position: 100% 0; } }
.cover-wrap .sub {
  font-size: clamp(18px, 1.8vw, 26px); color: var(--ink-500);
  max-width: 56ch; margin: 0 0 32px;
}
.cover-wrap .meta { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.cover-wrap .badge {
  border: 1px solid var(--line); padding: 10px 18px; border-radius: 999px;
  background: rgba(255,255,255,.75); backdrop-filter: blur(6px);
  color: var(--ink-700); font-size: 14px; font-weight: 500;
  transition: all .3s var(--ease-out);
}
.cover-wrap .badge:hover { background: var(--green-50); border-color: var(--green-200); color: var(--green-800); }
.cover-wrap .hint {
  margin-top: 38px; display: flex; align-items: center; gap: 10px;
  color: var(--ink-400); font-size: 13px;
}
.cover-wrap .hint kbd {
  background: white; border: 1px solid var(--line-2);
  border-bottom-width: 2px;
  padding: 4px 10px; border-radius: 6px; font-family: var(--font-body);
  font-size: 11px; color: var(--ink-700); font-weight: 600;
}

/* Floating leaves — decorative */
.leaves {
  position: absolute; inset: 0; pointer-events: none; overflow: hidden; z-index: 0;
}
.leaf {
  position: absolute; color: var(--green-500);
  opacity: 0; animation: float 14s linear infinite;
  filter: drop-shadow(0 4px 6px rgba(13, 122, 68, .15));
}
.leaf svg { width: 100%; height: 100%; }
@keyframes float {
  0%   { opacity: 0; transform: translateY(20px) rotate(0) scale(.8); }
  15%  { opacity: .7; }
  85%  { opacity: .5; }
  100% { opacity: 0; transform: translateY(-120vh) rotate(360deg) scale(1.1); }
}

/* Final slide */
.final .quote-full { margin-bottom: 28px; }
.final .thanks {
  margin-top: 36px; font-family: var(--font-display);
  font-size: clamp(28px, 3.2vw, 44px);
  color: var(--green-700);
  display: inline-flex; align-items: center; gap: 16px;
}
.final .thanks::after {
  content: ""; width: 60px; height: 2px; background: var(--green-600);
  animation: expand 1.5s var(--ease-out) 1.5s forwards;
  transform-origin: left; transform: scaleX(0);
}
@keyframes expand { to { transform: scaleX(1); } }

/* ====== Click ripple ====== */
.ripple {
  position: absolute; border-radius: 999px;
  background: radial-gradient(circle, rgba(27, 181, 110, .4), transparent 70%);
  pointer-events: none; transform: translate(-50%, -50%) scale(0);
  animation: rippleOut .8s var(--ease-out) forwards;
}
@keyframes rippleOut {
  to { transform: translate(-50%, -50%) scale(8); opacity: 0; }
}

/* ====== Teacher Notes Drawer ====== */
.notes-toggle {
  position: fixed; bottom: 22px; right: 22px; z-index: 40;
  background: linear-gradient(135deg, var(--green-800), var(--green-600));
  color: white; border: 0;
  padding: 14px 22px; border-radius: 999px; cursor: pointer;
  font-size: 13px; font-weight: 600; letter-spacing: .02em;
  box-shadow: 0 10px 30px rgba(13, 122, 68, .4);
  display: flex; align-items: center; gap: 10px;
  transition: all .3s var(--ease-out);
}
.notes-toggle:hover { transform: translateY(-3px); box-shadow: 0 14px 34px rgba(13, 122, 68, .5); }
.notes-toggle svg { width: 16px; height: 16px; }

.notes {
  position: fixed; left: 50%; bottom: 0; transform: translate(-50%, 110%);
  width: min(820px, 94vw); max-height: 65vh;
  background: white; border: 1px solid var(--line);
  border-radius: 22px 22px 0 0;
  box-shadow: 0 -16px 50px rgba(6, 78, 44, .22);
  z-index: 45; padding: 28px 32px 32px;
  transition: transform .5s var(--ease-spring);
  overflow: auto;
}
.notes.open { transform: translate(-50%, 0%); }
.notes header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 14px;
}
.notes header h3 {
  margin: 0; font-size: 13px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--green-700); display: flex; align-items: center; gap: 10px;
}
.notes header h3::before {
  content: ""; width: 8px; height: 8px; border-radius: 999px; background: var(--green-500);
  animation: pulse 2s ease-in-out infinite;
}
.notes header button {
  border: 0; background: transparent; cursor: pointer; color: var(--ink-500);
  width: 32px; height: 32px; border-radius: 10px;
}
.notes header button:hover { background: var(--green-50); color: var(--green-800); }
.notes p { margin: 10px 0 0; font-size: 17px; color: var(--ink-700); line-height: 1.65; }
.note-block + .note-block { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line); }
.note-sub {
  margin: 0; font-size: 11px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--green-700); font-weight: 600; display: inline-flex; align-items: center; gap: 8px;
}
.note-sub::before { content: ""; width: 6px; height: 6px; border-radius: 999px; background: var(--green-500); }
.note-sub.parent { color: #b65c0d; }
.note-sub.parent::before { background: #f59e0b; }
.parent-block[hidden] { display: none; }

/* ====== Navigation arrows ====== */
.nav {
  position: fixed; top: 50%; transform: translateY(-50%);
  width: 52px; height: 52px; border-radius: 999px;
  border: 1px solid var(--line); background: rgba(255,255,255,.8);
  display: grid; place-items: center; cursor: pointer;
  color: var(--ink-700); z-index: 40;
  backdrop-filter: blur(10px);
  transition: all .3s var(--ease-out);
}
.nav:hover { background: white; color: var(--green-700); border-color: var(--green-200); box-shadow: var(--shadow-2); transform: translateY(-50%) scale(1.08); }
.nav.prev { left: 22px; }
.nav.next { right: 22px; }
.nav svg { width: 20px; height: 20px; }
.nav:disabled { opacity: .25; cursor: not-allowed; }

/* ====== Overview grid (press 'O') ====== */
.overview {
  position: fixed; inset: 0; z-index: 80;
  background: rgba(251, 248, 241, .96);
  backdrop-filter: blur(12px);
  padding: 80px 6vw 60px;
  opacity: 0; pointer-events: none;
  transition: opacity .4s var(--ease-out);
  overflow-y: auto;
}
.overview.open { opacity: 1; pointer-events: auto; }
.overview h2 {
  font-family: var(--font-display); font-size: 28px; font-weight: 400;
  margin: 0 0 24px; color: var(--ink-900);
}
.overview .grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 18px;
}
.thumb {
  background: white; border: 1px solid var(--line); border-radius: 14px;
  padding: 18px; cursor: pointer; min-height: 140px;
  transition: all .3s var(--ease-out);
  display: flex; flex-direction: column; justify-content: space-between;
  position: relative; overflow: hidden;
}
.thumb:hover {
  transform: translateY(-4px) scale(1.02);
  border-color: var(--green-300);
  box-shadow: var(--shadow-2);
}
.thumb.active {
  border-color: var(--green-600);
  box-shadow: 0 0 0 3px rgba(13, 122, 68, .15);
}
.thumb .n { font-family: var(--font-display); font-size: 30px; color: var(--green-700); line-height: 1; }
.thumb .t { font-size: 13px; color: var(--ink-700); line-height: 1.35; margin-top: 10px; }
.thumb .k { font-size: 10px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-400); margin-bottom: 4px; }

/* ====== Keyboard cheatsheet ====== */
.cheat {
  position: fixed; inset: 0; z-index: 85;
  background: rgba(11, 31, 20, .7);
  backdrop-filter: blur(8px);
  opacity: 0; pointer-events: none;
  display: grid; place-items: center;
  transition: opacity .3s var(--ease-out);
}
.cheat.open { opacity: 1; pointer-events: auto; }
.cheat-card {
  background: white; border-radius: 20px; padding: 32px 40px;
  box-shadow: var(--shadow-3); max-width: 480px;
  transform: scale(.95); transition: transform .4s var(--ease-spring);
}
.cheat.open .cheat-card { transform: scale(1); }
.cheat h3 { margin: 0 0 18px; font-family: var(--font-display); font-size: 22px; font-weight: 500; }
.cheat ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 10px; }
.cheat li { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.cheat li span { color: var(--ink-700); font-size: 14px; }
.cheat kbd {
  background: var(--cream); border: 1px solid var(--line-2);
  border-bottom-width: 2px;
  padding: 4px 10px; border-radius: 6px; font-family: var(--font-body);
  font-size: 12px; color: var(--ink-700); font-weight: 600; min-width: 28px; text-align: center;
}

/* ====== Intro "Ligi" logo SVG on cover ====== */
.cover-mark {
  position: absolute; top: 20vh; right: 8vw;
  width: min(420px, 38vw); height: min(420px, 38vw);
  opacity: 0;
  animation: markIn 1.2s var(--ease-out) .3s forwards;
}
@keyframes markIn { to { opacity: 1; } }
.cover-mark svg { width: 100%; height: 100%; }
.cover-mark .ring {
  animation: ringSpin 40s linear infinite;
  transform-origin: center;
}
@keyframes ringSpin { to { transform: rotate(360deg); } }

/* Responsive */
@media (max-width: 900px) {
  .slide { padding: 104px 6vw 110px; }
  .cards, .stages, .weeks { grid-template-columns: 1fr; }
  .weeks::before, .stages::before { display: none; }
  .compare { grid-template-columns: 1fr; }
  .compare .arrow { transform: rotate(90deg); margin: 0 auto; }
  .swap-row { grid-template-columns: 1fr; }
  .swap-arrow { transform: rotate(90deg); margin: 0 auto; }
  .slide-num { right: 24px; top: 76px; }
  .brand-sub, .chapters { display: none; }
  .cover-mark { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

/* ========= Narration / Audio Dock ========= */
.ctrl-narration {
  width: auto !important;
  padding: 0 12px !important;
  gap: 8px;
  border-color: var(--green-200) !important;
  background: var(--green-50) !important;
  color: var(--green-800) !important;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
}
.ctrl-narration:hover { background: var(--green-100) !important; }
.ctrl-narration.playing {
  background: var(--green-600) !important;
  color: #fff !important;
  border-color: var(--green-600) !important;
}
.ctrl-narration .narr-label { display: inline-block; }
.ctrl-narration .i-pause,
.ctrl-narration.playing .i-play { display: none; }
.ctrl-narration.playing .i-pause { display: inline-block; }
.ctrl-narration svg { width: 14px; height: 14px; }

/* Audio dock */
.audio-dock {
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%) translateY(10px);
  width: min(560px, calc(100vw - 32px));
  background: rgba(251, 248, 241, 0.92);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow-2);
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 12px;
  z-index: 45;
  opacity: 0;
  pointer-events: none;
  transition: opacity .5s var(--ease-out), transform .5s var(--ease-out);
}
.audio-dock.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}
.audio-dock.playing { border-color: var(--green-300); box-shadow: 0 14px 46px rgba(10, 107, 60, 0.18); }

.audio-teacher {
  position: relative;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
}
.audio-teacher svg { width: 100%; height: 100%; display: block; border-radius: 50%; }
.audio-teacher .teacher-ring { transform-origin: center; animation: ringSpin 28s linear infinite; }
@keyframes ringSpin { to { transform: rotate(360deg); } }
.audio-teacher .teacher-pulse {
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid var(--green-400);
  opacity: 0;
  pointer-events: none;
}
.audio-dock.playing .audio-teacher .teacher-pulse {
  animation: teacherPulse 1.8s var(--ease-out) infinite;
}
.audio-dock.playing .audio-teacher .teacher-pulse.p2 {
  animation-delay: .9s;
}
@keyframes teacherPulse {
  0% { transform: scale(.9); opacity: .7; }
  100% { transform: scale(1.5); opacity: 0; }
}

.audio-info {
  flex: 1 1 auto;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.audio-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-body);
}
.audio-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--green-900);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.audio-time {
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--ink-500);
  flex: 0 0 auto;
}

.audio-bar {
  position: relative;
  height: 18px;
  cursor: pointer;
  touch-action: none;
  display: flex;
  align-items: center;
}
.audio-bar-bg {
  position: absolute;
  left: 0; right: 0; top: 50%;
  height: 4px;
  transform: translateY(-50%);
  background: var(--line-2);
  border-radius: 99px;
}
.audio-bar-fill {
  position: absolute;
  left: 0; top: 50%;
  height: 4px;
  transform: translateY(-50%);
  width: 0;
  background: linear-gradient(90deg, var(--green-600), var(--green-400));
  border-radius: 99px;
  transition: width .12s linear;
}
.audio-bar-knob {
  position: absolute;
  top: 50%;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--green-700);
  border: 2px solid #fff;
  box-shadow: 0 2px 6px rgba(6, 78, 44, .3);
  transform: translate(-50%, -50%);
  left: 0;
  transition: left .12s linear, transform .2s var(--ease-spring);
}
.audio-bar:hover .audio-bar-knob { transform: translate(-50%, -50%) scale(1.15); }

.audio-buttons {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 0 0 auto;
}
.abtn {
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--green-800);
  transition: background .18s, color .18s, border-color .18s;
}
.abtn:hover { background: var(--green-100); border-color: var(--green-200); }
.abtn svg { width: 18px; height: 18px; }
.abtn .i-pause, .abtn .i-mute { display: none; }
.abtn.playing .i-play { display: none; }
.abtn.playing .i-pause { display: block; }
.abtn.muted .i-vol { display: none; }
.abtn.muted .i-mute { display: block; color: var(--danger); }

.auto-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  user-select: none;
  margin-left: 4px;
}
.auto-toggle input { display: none; }
.auto-toggle .switch {
  position: relative;
  width: 30px;
  height: 18px;
  background: var(--line-2);
  border-radius: 99px;
  transition: background .25s var(--ease-out);
  flex: 0 0 auto;
}
.auto-toggle .switch .knob {
  position: absolute;
  top: 2px; left: 2px;
  width: 14px; height: 14px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0,0,0,.2);
  transition: left .25s var(--ease-spring);
}
.auto-toggle input:checked + .switch { background: var(--green-600); }
.auto-toggle input:checked + .switch .knob { left: 14px; }
.auto-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--ink-500);
  font-family: var(--font-body);
}

@media (max-width: 640px) {
  .audio-dock { bottom: 10px; padding: 8px 10px; gap: 8px; }
  .audio-teacher { width: 34px; height: 34px; }
  .auto-label { display: none; }
  .audio-title { font-size: 12px; }
  .ctrl-narration .narr-label { display: none; }
  .ctrl-narration { padding: 0 10px !important; }
}

/* ========= Start Overlay ========= */
.start-overlay {
  position: fixed;
  inset: 0;
  z-index: 120;
  background: radial-gradient(1200px 800px at 50% 30%, rgba(19, 130, 80, 0.25), transparent 60%), rgba(11, 31, 20, 0.55);
  backdrop-filter: blur(14px) saturate(130%);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 1;
  transition: opacity .5s var(--ease-out);
}
.start-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}
.start-card {
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: 26px;
  box-shadow: var(--shadow-3);
  padding: 36px 32px 32px;
  max-width: 460px;
  text-align: center;
  transform: translateY(0) scale(1);
  animation: startCardIn .6s var(--ease-spring) both;
}
@keyframes startCardIn {
  from { opacity: 0; transform: translateY(16px) scale(.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.start-avatar {
  width: 96px;
  height: 96px;
  margin: 0 auto 18px;
  position: relative;
}
.start-avatar svg { width: 100%; height: 100%; display: block; }
.start-avatar .start-ring { transform-origin: center; animation: ringSpin 30s linear infinite; }
.start-card h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(22px, 3vw, 28px);
  color: var(--green-900);
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}
.start-card p {
  font-family: var(--font-body);
  color: var(--ink-600);
  font-size: 15px;
  line-height: 1.55;
  margin: 0 0 22px;
}
.start-card p kbd {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--green-100);
  border: 1px solid var(--green-200);
  font-size: 12px;
  font-family: var(--font-body);
  color: var(--green-900);
}
.start-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}
.start-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 99px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: transform .2s var(--ease-spring), background .2s, color .2s, box-shadow .2s;
  border: 1px solid transparent;
}
.start-btn.primary {
  background: var(--green-700);
  color: #fff;
  box-shadow: 0 6px 20px rgba(10, 107, 60, 0.28);
}
.start-btn.primary:hover { background: var(--green-800); transform: translateY(-1px); }
.start-btn.ghost {
  background: transparent;
  color: var(--ink-600);
  border-color: var(--line-2);
}
.start-btn.ghost:hover { background: var(--green-50); color: var(--green-900); }

/* Keep audio dock out of the way when overlay visible */
.start-overlay:not(.hidden) ~ .audio-dock { opacity: 0 !important; pointer-events: none !important; }

/* Subtle pulse on topbar brand while narration plays */
.narr-active .brand-title { color: var(--green-700); }

/* ====== Responsive Height (To fit content on typical laptops without scrollbars) ====== */
@media (max-height: 850px) {
  .slide-inner { padding: 80px 6vw 110px; }
  .slide-num { top: 80px; }
  h1.title { margin: 12px 0 10px; font-size: clamp(30px, 4.2vw, 56px); }
  .subtitle { margin-bottom: 16px; font-size: clamp(15px, 1.5vw, 20px); }
  
  .bullets { margin-top: 16px; gap: 10px; }
  .bullets li { padding: 12px 18px; gap: 14px; }
  .bullets li .ico { flex: 0 0 38px; height: 38px; }
  .bullets li .ico svg { width: 18px; height: 18px; }
  .bullets li p { font-size: clamp(14px, 1.25vw, 17px); margin-top: 2px; }
  
  .cards { margin-top: 20px; gap: 16px; }
  .card { padding: 22px; }
  .card .ico { width: 40px; height: 40px; margin-bottom: 14px; }
  .card h3 { font-size: 19px; margin-bottom: 6px; }
  .card p { font-size: 14px; line-height: 1.45; }
  
  .stages { margin-top: 24px; gap: 16px; }
  .stage-card { padding: 22px 20px; }
  .stage-card h3 { font-size: 19px; margin-bottom: 6px; }
  .stage-card p { font-size: 14px; }
  
  .weeks { margin-top: 36px; gap: 14px; }
  .week { padding: 20px 18px 18px; }
  .week .circle { width: 44px; height: 44px; font-size: 18px; margin: -42px 0 14px; }
  
  .compare { margin-top: 20px; gap: 16px; }
  .compare .cmp { padding: 20px; }
  
  .speech-list { margin-top: 20px; gap: 12px; }
  .speech { padding: 18px 24px; }
  .speech blockquote { font-size: 20px; }
  
  .swap-row { margin-top: 30px; gap: 18px; }
  .swap-tile { padding: 30px 24px; min-height: 160px; font-size: clamp(22px, 2.5vw, 34px); }
  
  .quote-full { font-size: clamp(26px, 3.8vw, 50px); }
  .cover-wrap h1 { margin: 0 0 14px; font-size: clamp(42px, 6vw, 90px); }
  .cover-wrap .sub { margin: 0 0 24px; }
}

@media (max-height: 720px) {
  .slide-inner { padding: 74px 4vw 110px; }
  .slide-num { top: 74px; right: 4vw; }
  
  .bullets { gap: 8px; }
  .bullets li { padding: 10px 14px; gap: 12px; }
  .bullets li p { font-size: clamp(13px, 1.15vw, 15px); }
  .bullets li .ico { flex: 0 0 34px; height: 34px; }
  
  .cards { gap: 12px; }
  .card { padding: 18px; }
  .card h3 { font-size: 17px; }
  .card p { font-size: 13px; }
  
  .stages { margin-top: 20px; gap: 12px; }
  .stage-card { padding: 18px 14px; }
  .stage-card h3 { font-size: 17px; }
  
  .weeks { gap: 10px; margin-top: 28px; }
  .week { padding: 16px 14px 14px; }
  .week h4 { font-size: 16px; }
  
  .speech-list { gap: 10px; }
  .speech blockquote { font-size: 18px; line-height: 1.3; }
  .speech .effect { margin-top: 8px; }
  
  .compare { gap: 10px; margin-top: 16px; }
  .compare .cmp { padding: 16px; }
  .compare .cmp p { font-size: 15px; }
}